Table construction



Oct. 24, 1950 A. J. KIZAU TABLE CONSTRUCTION 6 Sheets-Sheet 1 I Filed July 19, 1946 Oct. 24, 1950 A. J. KlzAuR TABLE CONSTRUCTION s sheets-sheet 2 Filed July 19, 1946 IIIIIIIIIIIIIIIIIIII 3427/ /02, 1 /ZA I Oct. 24, 1950 A. J. KIZAUR TABLE cousmucnon 6 Sheets-Sheet 3 Filed July 19, 1946 2 60 0m w N. Z r

Oct. 24, 1950 A. J. KlZAUR TABLE CONSTRUCTION 177M272 5v? 74/87/408 J U/z/wz W My C 1% Oct. 24, 1950 A. J. KIZAUR 2,526,379

TABLE CONSTRUCTION Filed Jul? 19, 1946 6 Sheets-Shet 5 Oct. 24, 1950 A. J. KIZAUR 2,526,379

TABLE CONSTRUCTION Filed July 19, 1946 6 Sheets-Sheet 6 Ewe/87 :Az muxe d. K/ZA we fiz 3 a w My 5 496 Patented Oct. 24, 1950 TABLE CONSTRUCTION Arthur J. Kizaur, Cicero, Ill., assignor to General Electric X-Ray Corporation, Chicago, 111., a corporation of New York Application July 19, 1946, Serial No. 684,650

- 13 Claims. l

The present invention relates in general to tables, and has more particular reference to a tilting structure particularly well adapted for use in supporting human bodies, selectively in vertical and horizontal positions for examination, the table structure of the present invention being especially adapted for use in connection with X- ray fluoroscopic examination and for radiographic purposes.

An important object of the present invention is to provide an improved, light weight, yet rigid table structure, including tilting support means for carrying the table in, and shifting the same between, vertical and horizontal positions; a

further object being to provide improved tilting support means operatively connected with the table along one side thereof, thereby leaving the other side free and unobstructed.

Another important object is to provide a tilting table supported on one side only, whereby cara rying means for radiographic, or other equipment may be mounted on the table for unhampered adjustment along the unsupported side of the table.

Another important object is to provide a table structure of the character mentioned, and comprising a framework of hollow tubular members interconnected to form a rigid, light weight table structure; a further object being to form the table as a frame, including tubular side members extending longitudinally on each side of the table in position to carry a table top panel on and in position extending between the longitudinal side members; a still further important object being to utilize the tubular table frame members to house actuating mechanism therein.

Another important object is to provide novel table tilting means, comprising relatively crossed members tiltingly interconnected between the table structure and a supporting base, in conjunction with thrust mechanism for supporting the crossed members in adjusted, relatively crossed position, and, hence, to support the table mounted thereon at a desired adjusted inclination; a further object being to form at least one of said crossed members as a tube, such tube being inexpensive, yet aifording appreciable rigidity.

Another important object resides in utilizing tubular members suitably fastened together, as by welding or otherwise, to provide a rigid table supporting base.

Another important object resides in utilizing hydraulic means for actuating the table tilting mechanism; a further object being to incorpo: rate the hydraulic means compactly in the supporting base of the table and in the table structure.

Another important object resides in providing hydraulic control means in a table for X-ray fiuoroscopy and roentgenological purposes.

Another important object resides in providing a table and associated support means for mounting X-ray apparatus for adjustable movement longitudinally of the table, including hydraulically actuated and controlled means for so moving the associated X-ray equipment; a further object being to provide for such control in a tilting table, wherein the table itself is operatively connected with the hydraulic actuating system, to the end that the tilted adjustment of the table, as Well as the longitudinal adjustment of the associated X-ray apparatus, may be accomplished by hydraulic control valves, all conveniently located at a control station on one side of the table.

Another important object resides in providing improved hydraulic means for the control of a tiltable table of the character mentioned, and for the control of adjustable apparatus mounted on the table.

Another important object is to provide an improved tilting table construction that is unusually light in weight, the structure having, at the same time, extraordinary rigidity.

The foregoing and numerous other important objects, advantages, and inherent functions of the invention'will become apparent as the same is more fully understood from the following description, which, taken in connection with the accompanying drawings, discloses a preferred embodiment of the invention.

Referring to the drawings:

Fig. l isa perspective View illustrating a table structure embodying the present invention, the view showing longitudinally adjustable carriage means for supporting auxiliaryequipment;

Fig. 2 is a sectional view along the line 2--2 in Fi 1; I

Figs. 3 and 4 are enlarged views of portions of Fi 2;

Fig. 5 is a top plan view of the table shown in Fig. 1;

Figs. 6, '7, and 8 are sectional views, respectively taken substantially along the lines 6-45, 'i-'l, and 88 in Figs. 1, 5, 6, and '7;

Fig. 9 is a diagrammatic view showing an hydraulic system that may be incorporated in the structure shown in Fig. 1; and

Fig. 10 is a perspective view of a table embodying the present invention and applied for use with separately mounted and longitudinally adjustable auxiliary equipment.

To illustrate the invention, the drawings show an adjustable table structure II particularly well suited for supporting bodies for examination, the structure being especially adapted for X-ray examination and therapy purposes, in that it is tiltably supported for movement between horizontal and vertical positions, and may be secured at any desired inclination between its horizontal and vertical positions in order to support a body thereon at any desired inclination. The table structure, further, is well adapted for the adjustable mounting thereon of auxiliary apparatus, such as an X-ray light source, screens, diaphragms, and holders of X-ray sensitive film material, which may be mounted on the table for longitudinal and lateral adjustment, substantially in the manner taught in United States Letters Patent No. 2,315,786, issued April 6, 1943, on the invention of Julius J. Grobe.

The table structure I! comprises a frame I2 and adjustable support means I3 carrying the frame; and the present invention includes not only the novel features of the light weight, hollow frame structure, but, also, the features of the rigid table support structure I3, as well as hydraulic operating means I4 for actuating the adjustable support means I3, the hydraulic means serving, also, to actuate adjusting means I5 housed, preferably and conveniently, within the hollow members comprising the frame I2, for the purpose of adjusting holder frames I6 and I! longitudinally on the frame I2, and, if desired, to adjust a frame I8 on the frame I! transversely with respect to the frame I2, the frame I8 serving to support auxiliary equipment, such as a source of X-rays I9, and a fluoroscopic screen I9, adjustably above the table.

The frame is may comprise a mounting for a film holder and a bucky diaphragm, the same being provided with bearing wheels on opposite sides thereof, in position to ride upon suitable track means 2I on the frame I2, so that the mounting frame I6 may be moved longitudinally along the table I2. The frame II, also, may be provided with wheeled means 22 mounted on the table frame for movement longitudinally thereof, in tracks 22' on the frame I2, said frame IT, in turn, supporting the frame I8, which preferably includes transversely extending members 23 supported by suitable rollers 24 on the frame I! for movement of the frame I8 transversely with respect to the table frame I2. The frame I8 may include an upstanding portion 25 supported outwardly of the frame I2, at one side thereof, said upwardly extending portion serving as a mounting for suitable support means, which may be adjustable vertically On the said upstanding portion for the purpose of carrying a source of X-rays and, also, fluoroscopic screen means in vertically spaced relationship with respect to the table, the screen means and source of X-rays being independently adjustable on the upstanding frame portion 25, as, for example, in the manner taught in said aforesaid United States Letters Patent No. 2,3157%. The frames I6, I'.', and I8 may be formed in any suitable, convenient or preferred fashion, the aforesaid United States Letters Patent No. 2,315,786 showing suitable, relatively movable frame means of the sort that may be employed, and the manner of mounting the same for movement upon the table frame. Suitable table top means 26, also, may be applied on the frame I2 in position overlying the frames I6 and IT, in

the manner taught in said aforesaid United States- Letters Patent No. 2,315,786, for the purpose of supporting a body on the table.

The present invention contemplates the fabrication of the frame I2 of hollow, sheet metal members, including a pair of spaced apart, longitudinally extending, hollow, sheet metal frame members 21 and 28 of preferably rectangular sectional configuration. The opposite ends of the longitudinal members 21 and 28 are rigidly interconnected in spaced relationship by transverse bracing and spacing members 29 and 30. The members 29 and 30, also, preferably comprise tubular members of metal, having preferably rectangular sectional configuration, although it will be apparent that the present invention is not necessarily limited to the rectangular sectional shape of the frame members. The frame members forming the frame I2 may be secured together in any suitable or convenient fashion, the same being preferably interconnected, as by welding, the members preferably comprising steel parts that are particularly well suited for inexpensive, yet rigid interconnection in the manner mentioned. The frame I2 may, thus, comprise a rectangular structure made of tubular frame members rigidly interconnected together, the preferred box-like character of the frame members affording a structure of unusual rigidity.

The frame member 28, on one side of the frame, is preferably substantially deeper than the member 21, on the other side of the frame. The frame member 28 is made deeper more especially to allow the frame I! to be rollingly mounted on tracks supported at the inner face of the member 28, and to allow the transverse members 23 of the frame I8 to project outwardly of the frame I 2 beneath the member 21. The additional depth of the frame member 28, also, increases its rigidity to an extent allowing the frame to be mounted on the support means I3 only at the side thereof comprising the member 28, the other side of the frame being unsupported and entirely free of obstruction, so that the frame I8 may traverse the frame I2 longitudinally throughout the entire length of the frame I2.

The hollow members comprising the frame I2 may be utilized, to advantage, to entirely enclose the actuating means I5. Said actuating means may comprise a spindle mounted pulley 3| disposed within the member 28, the pulley 3I preferably having four cable grooves in its periphcry. The spindle, which carries the pulley 3|, may be supported on a bracket 32 which, in turn, may be connected to a plunger or piston 33, operating in an hydraulic cylinder 34 and comprising means for adjusting the position of the pulley 3I longitudinally within the frame member 28. While any suitable mechanism may be employed for so adjusting the pulley, hydraulic means, comprising the piston and cylinder 33 and 34', affords a compact mechanism housable within the member 28 for accomplishing the adjusting movement of the pulley'3I. The bracket 32, as shown more particularly in Figs. 7 and 8 of the drawings, may be provided with roller wheels 35 adapted to bear on the inner walls of the member 28, in order to support the pulley 3I for longitudinal movement within the member 28. The hydraulic cylinder 34, also, may be mounted within the member 28, as by means of mounting brackets 34 at its opposite ends. A pair of flexible driving members 36, having ends anchored upon a suitable mounting 31 formed on and within the member 28, preferably at one end thereof, extend from the mounting 31 around the pulley wheel 3| and thence onguide means,

38, preferably comprising a pulley, disposed within the transverse bracing member 38, at the end thereof which is connected with the member 28. The pulley 38 is preferably formed with two grooves, and one of the cords 36 extends around the guide pulley 38 through an opening in the inner wall of the member 38, and is connected on the frame H. The other cord 36 extends around the guide pulley 38 and thence through the frame member 30, and around a guide pulley 39 dis-. posed in the member 30, at the end thereof which is connected with the member 21, the cord extending from the guide pulley 39 through an opening in the inner wall of the member 36, and being connected to the frame l1.

A second pair of flexible driving members 48, having ends anchored within the member 28, as on the mountings 4| on one of the brackets 34', extend thence around the pulley 3|. and through the member 28, to the end thereof that is connected with the transverse frame member 29, the driving members 40 passing over guide means 42, similar to the guide means 38 and located in the end of the transverse member 29 adjacent the frame member 23. One of the cords 40 passes around the guide means 42, through an opening in the inner face of the member 29, and is connected to the frame l1. The other driving member 49 passes around the guide means 42, and thence through the transverse member 29 to a guide 43, corresponding with the member 39 and located in the end of the transverse member 29 that is connected with the frame member 21, said driving member passing around the guide 43, thence through an opening in the inner face of ,the member 29, and being connected with the frame member l1. The driving members 36 and 40 are, thus, connected to the opposite ends of the frame l1. Hence, by moving the pulley 3| longitudinally within the frame member 28, the frame [1 may be drawn longitudinally in either direction on the frame l2.

The support means I3 is adapted to tilt the frame |2 from the horizontal position, shown in Fig. 1, to a vertical position by lowering the right hand end of the frame, viewing Fig. 1, while raising the left hand end thereof. When so tilted, it

will be obvious that the frame |1, under the in-.

fluence of gravity, will tend to move toward the lowered or right hand end of the frame. The tendency of the frame |1 thus to move in one direction on the frame I2, when the same is tilted, will tend to move the pulley 3| in the opposite direction within the frame member 28. The cylinder 34 and piston 33, however, are preferably mounted in the frameso that such tendency to move is counterbalanced by the pressure. of operating fluid in the cylinder. Additional counterbalancing means, such as weights or springs, also may be connected to the pulley bracket 32, if desired.

The piston 33 is adapted to be moved out wardly of the cylinder 34 in response to liquid delivered in the cylinder. To retract the piston when liquid is released from the cylinder, retracting means, preferably comprising tension springs 44, may be applied within the member 28 and connected, as on suitable anchors 45, on the frame I2, as at one end of the member 28, said springs preferably extending in guide tubes 46, and being connected on anchoring lugs 41 formed on the bracket 32.

Means for shifting and counterbalancing the carriage 6 may, also, be provided, such means being conveniently disposed within the hollow frame member 21. Such actuating and counterbalancing means for the carriage l8, as shown more particularly in Figs. 5 and 6 of the drawings, may comprise an hydraulic piston and cylinder 48 and 49, similar to the piston and cyl-.

inder 33 and 34, and mounted within the member 21, as by means of brackets 49' at the opposite ends of the cylinder 49, for securing and supporting the same within the member 21. The piston carries a bracket 58, in which may be turnably mounted a pulley 5| having four grooves. A pair of preferably flexible driving members 52 ride in two of the pulley grooves, said members 52 having ends anchored, as at 53, at one end of the member 21, the driving members 52 extending thence around the pulley 5| and around guide pulleys 54 at one end of the member 21, and thence through an opening in the upper face of the member 21 to a guide pulley 55 supported above the upper face of the member 36, at the end thereof which is connected with the member 21. From the guide pulley 55 one of the members 52 extends to, and is anchored on, the carriage I6, while the other member 52 extends to the end of the member 39, which is connected with the member 28, and extends thence around a guide pulley 56 to the frame l6 on which it is fastened.

The pulley 5| also carries a second pair of flexible tension members 51, which have ends anchored, as at 58, within the member 21, as on one of the brackets 49', the members 51 extending thence around the pulley 5| and around guide pulleys 59, 68L and 6|, corresponding with the guide pulleys 54, 55, and 56, the members 51 being connected with the carriage l6. It will be seen that the members 52 and 51 are, thus, attached at opposite ends of the carriage It, so that by moving the pulley 5| longitudinally within the member 21 by actuating driving means 48 and 49, the carriage |6 may be adjusted 1ongitudinally of the frame l2.

The weight of the carriage, of course, may be appreciably less than the weight of the frames l1 and I8, and, consequently, does not require counterbalancing, where the actuating means 49 comprises an hydraulic piston and cylinder. If desired, however, counterbalancing means, such as weights-or springs, may be applied within the member 21 and operatively connected with the pulley carrying bracket 50.

The foregoing table frame construction affords relatively light weight, yet extremely rigid table means which may be supported in any preferred fashion. Because of its unusual inherent rigidity, however, the table construction is particularly well adapted for support along one side only, the other side being entirely free and unobstructed; and the present invention contemplates the provision of novel, and relatively inexpensive, tilting support means H; for carrying the table. As shown, the support means l3 comprises a base 62 of any suitable construction, the base preferably comprising a rectangular frame of preferably weldingly interconnected tubular members, including side members 63 and end members 64,

said members preferably comprising cylindrical tubes or pipes of metal, such as steel.

The adjustable table supporting means I3 may 7 7 of the member ssma be pivoted, as at 68,- om suitable bracket means mediallyof theends of: the frame member 28. As: shown, the member. 65 preferably comprises a hollow tubularpipe? affording strength and rigidity at low cost.

The. member 66 preferably comprises. a pair of sheet metal plates 69, having ends. pivoted as at "I0, on the base: 62 vertically beneath the: pivoted connection of the member 65 on the: frame member 28. The members 69 extend on opposite sides of the member 65, crossing the. same, and have remote ends pivotally connected, as at I I, on suitable bracket means on the frame I2, at an end of the member 28.

By turning the member 65 on the frame 62 about the pivot. 87, it may be moved between the members 69 in a direction toward and away from the ends of the members 69 that are pivoted on. the frame I2. As a result of such pivoting movement of the member 65, the supported table frame I2 may be tilted in the-manner heretofore described, between the horizontal position, shown in Fig. 1, and a vertical position in which the right hand end of the frame l2, viewing Fig. 1, is disposed immediately above the pivot 61, with the left hand end of the frame I2 vertically above its right hand end.

Any suitable operating mechanism, of course, may be utilized for turning the member 65 with respect to the base 62. To this end, extensible screw means may be applied between the pivots 68 and I0. As shown in the drawings, however, means, comprising an hydraulic cylinder I2 and a cooperating piston 73, is mounted within, and as a part of, the member 66, the cylinder I2 being secured on and between the members 69, so that the cylinder is rigidly connected with said members and, hence, movable therewith on the pivot ID. The piston member 13 projects toward the member 65 and carries a bracket I4, in which is mounted a driving roller 15 in position to engage and ride upon the surfaces of the member 65, which may, if desired, be provided with a plate 16 forming abearing track-for the roller. By operating the hydraulic means I2 to project the piston 13, the member 65' may be moved in a direction toward the pivot H in order to tilt the supported table I2 toward verticalposition. By retracting the piston, the tablemay be returned to the horizontal position shown in Fig. 1; and by regulating the operating means I2, the table may be supported in vertical, or horizontal, or at any intermediate inclination; It is desirable, also, to provide means normally biasing the table toward horizontal position. To this end, a flexible traction member I'Imay bev provided, having an end anchored on the frame member 28, as at a suitable point between the trunnions 68 and II, and spaced from the latter" a sufficient distance to apply an appreciable turning movement on the frame about the'axis of said trunnion H. The tension member 11 may extend around a guide roller or pulley 18 on the. base 52, and may be connected on one endofaa resilient tension spring '59, the other end of which.

is secured, as on a suitable anchor. 80', on the: base 62. Tension thus applied to the frame, when in vertical position, by the member I7, will yield ingly urge the frame toward horizontal position, and will urge the member 65 against the roller 15 and cause said member to follow the roller as and when the plunger I3 is retracted.

It will be obvious, however, that theinvention is not necessarily limited to hydraulic operating means, either for actuating the tilting mecha'm'sm: I3;.or:for1 actuating the frame adjusting pulleys 3!.- and 5I'.. The apparatus of the present invention, however, is particularly well suited for embodying; hydraulic. actuating. means for adjustingrthe; tiltin table, and for the adjustmentor the; movable frames I6, I1, and I8. this. end; the adjusting. means 34, 49,. and 72 preferably comprise hydraulic cylinders, to which azfluid operating. medium ma be selectively delivered, as. by the hydraulic. system illustrated.

moreiparticularly in Fig. 9 of the drawings. As shown,. the hydraulic system includes a fluid reservoir. 81, which. may conveniently comprise.

atank1mounted in the base 62,. as between the members. 83, preferably at one end of the base" The hydraulic. systemrnay. include a pump 82.

driven by motive;means,.such as an. electric'motor 83, the. pump having an. inlet pipe. 84 from the reservoir, the pipe preferably being fitted with filtering means 85, as at its reservoir connected end. The discharge side of: the. pump 82 may be connected with a delivery. conduit system. 86, including branch conduits 8.1 and. 88

connected,.respectively, through adjustable valves.

89 and 90, for selectively controlling the flow of hydraulic fluid through the pipes 81 and 88 to the operating. cylinders of the frame shifting devices 34.'and 49. Another branch pipe 9I connects the delivery conduit'systemthrough auvalve.

92 with the table tilting device I2, while additional conduit means 93. may be provided for connecting. the delivery system through valves 94 to operating devices 95, for the actuationof other operable devices on, or associated with, the table structure, as,. for example, for adjusting the frame I8 laterally of the table on.

the frame IT, for adjusting a support frame vertically onthe frame portion 25, foroperating latch mechanism to secure the frames I6, I! and l8- in adjusted position, or: for. operating other auxiliary equipment.

The pump 82 is preferably driven continuously by the motor 83 to maintain a supply of the hydraulic medium in the conduit; system 86, at a selected operating. pressure determined by check valve means 96:disposed in a conduit 91, connected between the conduit system 86 and the reservoir. When fluid pressurev in the system 86 exceeds a preselected. value, determined by the adjustmentof the check valve 96, fluid may circulate directly from the system 86 to the reservoir. for. recirculation. through the pump. The valves 89, 99, 92, and 94 are, also, preferably connectediwith conduit means 98 forming;a'1c turn flow system to the reservoir BI.

The valve means 89, 90, 92, and 94 comprise manually operable valves for connecting'the. devices 34,.49, I2, and95, either with the supply system 86, or with the return flow system 98, and. also, provide for blocking connection of said devices 34, 49, I2; and 95 with either of said systems, wherebythe devices may be actuated in one direction or the other, or locked in adjusted position.

The devices' 34} 49, I2, and 95 may be of'any suitable, preferred or convenient construction, and the'operating valves 89, 90, 92, and 94, likewise; may have any suitable or preferred form. As shown, the device 49 comprises a cylinder,

and its cooperating thrust member 48 comprises a piston rod having a piston head 99" within the cylinder. The'opposite endsof the cylinder 49 are connectedby means of the conduits I00 with the valve 90. The valve comprises a valve member ID-I', which may be arranged selectively-in any one of three positions, to connect either end of the cylinder 49 with the fluid supply system 86, while connecting the other'end of the cylinder with the return system 98; or the member IOI may be positioned to block connection of both pipes I00. The member 48 may, thus, be projected or retracted through a displacement equal to the displacement of the piston head 99 within the length of the cylinder, and the member 49 may be locked in place with the piston head 99 in any intermediate position between the opposite ends of the cylinder 49. As a consequence, the carriage I6 may be moved to, and locked in, any adjusted position at or between the opposite ends of the frame I2.

As shown, the device 34 comprises a cylinder in which the cooperating piston rod 33 fits snugly, one end of the cylinder 34 only being connected, as by means of a pipe I02, with the valve 89, the piston 33 being normally urged, as by means of the springs 44, toward said end of the cylinder. The valve'89 comprises a valve member I03, positionable to connect the conduit I02 with the supply system 86, whereby to deliver fluid under pressure into the cylinder 34 for the projection of the piston 33 in one direction outwardly of the cylinder, against the influence of the springs 44. The valve member I03 is, also, positionable to connect the conduit I02 with the return system 98, whereby the piston 33 may be retracted into the cylinder 34, under the influence of the springs 44. The valve member I03 may, also, be positioned to block connection of the conduit I02 from either system, in order to lock the piston 33 in any relatively extended position with respect to the cylinder 34. As a consequence, the carriage I6 may be adjusted and locked in any adjusted position at and between the opposite ends of the table frame I2.

The table tilting device 12 preferably comprises a cylinder, from one end of which the extensible piston member 13 projects, the opposite end of the cylinder being connected, as by means of a conduit I04, with the valve 92. The valve 92 comprises a movable member I05, which may be positioned to connect the conduit I04 with the fluid supply system 86, in order to project the piston member 13 outwardly of the cylinder, against the weight of the table applied to the piston through the member 65 and the bearing roller 15. The valve member I05 may, also, be positioned to connect the conduit I04 with the return system 98, to allow retraction of the piston 13 within the cylinder, under the influence of the weight of the table. The member I05, also, may be positioned to block connection of the pipe I04 from the supply and return systems, in order to lock the piston member 13 in any adjusted position within the cylinder 12. If desired, an extension sleeve I06 may be applied telescopically around the piston member 13 within the cylinder 12.

The valve members 94 likewise provide for the selective connection of the devices 95 with the systems 86 and 98 for the operation of said devices.

The table, shown in Fig. 1 of the drawings, carries the frames I1 and I8, which are adapted to support an X-ray tube and, if desired, a fluoroscopic screen, adjustably in position above or below the table. The X-ray light source and screen, thus, may be supported directly on the table frame. For some purposes, however, it may be desirable to dispense with the frames I1 and I8, and to mount the X-ray source and the fluoroscopic screen, if used, on a separate support structure, as shown in Fig. 10. To this end, a support standard, comprising an upright post I01, may be provided and mounted, as on suitable trackways I08 and I09, for movement longitudinally of the table frame I2, along one side thereof. To this end, the trackways I08 and I09 may comprise channel members adapted to receive mounting rollers at the upper and lower ends of the post I01. The lower end of the post is preferably formed with a base H9, in which track engagin rollers III are mounted to rollingly support the upright I01 for movement along the trackway I09. A manually operable track engaging latch II2 may also be provided on the base IIO for locking the member I01 and its carriage I I0 in adjusted position on the track.

The upper end of the post I01, also, may be provided with a guide roller adapted to travel within the track member I08 to support the post in upright position on the track I99.

The post I01 may be provided with suitable mounting frames, preferably adjustable vertically thereon, for carryin an X-ray generator or light source in vertically adjustable position with respect to the table frame I2, such supporting means, also, preferably providing for the adjustment of the light source transversely with respect to the table frame. It is also desirable to provide for the tilting movement of the light source on the support I01, as the post I 01 .is moved longitudinally of the table, it being desirable, in some instances, in making radiographic pictures, to move the light source in one direction, above an object being pictured, while moving the sensitive photographic materal in the carriage I6 in an opposite direction beneath the object being pictured. Such procedure results in the production of an accurate, sharp picture of an internal portion of the object being radiographed, while blurring, and thus obliterating, surrounding portions of the object. To provide for making radiographs of the character mentioned, the support post I01 may be provided with a frame II3, tiltably' mounted on the post, and vertically adjustable thereon, as by means of a suitable bracket H4. The frame H3, as shown, comprises a pair'of spaced bars I I5, preferably extending transversely with respect to the table frame, and on which bars a source of light may be mounted for adjustment transversely of the table frame. The frame I I3 may be provided with a downwardly extending actuating rod IIG pivotally connected, as'at II1, on bracket means II8 adapted to be clamped upon the table frame I2, as on the member 21 thereof, in any adjusted position longitudinally of the member 21. When so clamped, it will be seen that movement of the support I01 along its track I09 will result in a corresponding tilting movement of the frame I I3, and any light source mounted thereon, about the pivotal mounting axis of the frame I I3 in the bracket I I4. While such pivoting movement is accomplished, a, corresponding movement of the carriage I6 may also be accomplished in the opposite direction by suitably controlling the valve 90. In order to control the movement of the member I01 on its track I09 accurately, whereby to determine the corresponding movement of the frame I I3, the member I01 may be provided with driving means, comprising a, wheel II9 having any preferred driving engagement with the track I09, said wheel, as shown in Fig. 10 of the drawings, comprising a sprocket or pulley drivingly connected with a loop formed in a flexible driving member I20. The member I20 extends within the channeled track member I09 and is anchored therein at its opposite ends. The member I20 has a medial loop forming portion drivingly connected with the wheel member IIS, the member I20 extending from the track to the wheel around suitable guides I2I mounted on the base IIO. By turning the member II9, the support I! may be drawn in one direction or the other along the track I09 through a displacement determined by the movement of the wheel I I9. Any suitable means, of course, may be provided for turning the wheel H9 in order to accomplish movement of the support I0I on the track. As shown, however, the wheel H9 is drivingly connected through gear means I22 with a rack formed on the projecting end of the piston of an hydraulic cylinder 95', which may comprise one of the operating devices 95 heretofore described. The rack is normally urged in one direction inwardly of its cooperating cylinder, as by means of a spring I23, so that by selectively actuating a valve 94, which is operatively associated with the device 95 and the hydraulic system I4, the wheel I I9 may be turned in either direction to accomplish a corresponding travelin movement of the support I01 on the track I09 and longitudinally of the table frame I2. By correlating the movement of the valve 94' with the movement of the valve 90, the movement of a light source on the frame II3 may be accu rately correlated with the movement of X-ray sensitive material in the carriage I6, whereby a radiograph of the sort heretofore described. may be made.

It is thought that the invention and its numerous attendant advantages will be fully understood from the foregoing description, and it is obvious that numerous changes may be made in the form, construction and arrangement of the several parts without departing from the spirit or scope of the invention, or sacrificing any of its attendant advantages, the form herein disclosed being a preferred embodiment for the purpose of illustrating the invention.

The invention is hereby claimed as follows:

1. A table for X-ray examination comprising hollow sheet metal members of rectangular sectional configuration rigidly interconnected to form a table frame having spaced apart, longitudinal side members, carriage means adjustably shiftable longitudinally of said frame, a support structure pivotally connected with said frame solely on one side thereof, on one of said longitudinal side members, for mounting the frame, in cantilever fashion, as a tilting table, actuating means mounted within and enclosed by one of said longitudinally extending table frame members for shifting said carriage on the frame, and hydraulically actuated means for tiltingly adjusting said table frame with respect to said base.

2. A table for X-ray examination comprising hollow sheet metal members of rectangular sectional configuration rigidly interconnected to form a table frame having spaced apart, longitudinal side members, carriage means adjustably shiftable longitudinally of said frame, a support structure pivotally connected with said frame solely on one side thereof, on one of said longitudinal side members, for mounting the frame, in cantilever fashion, as a tilting table, actuating means mounted within and enclosed by one of said longitudinally extending table frame members for shifting said carriage on the frame, hydraulically actuated means for tiltingly ad- .iusting said table frame with respect to said base, and means providing a common source of fluid pressure for operating said hydraulic actuating and hydraulically actuated means.

3. A table for X-ray examination comprising hollow metal members rigidly interconnected to form a table frame, and. a support structure for said frame including a base having spaced supports, a pair of supporting and tilting members each having a portion pivotally secured respectively each on a corresponding one of said supports on said base, said members being relatively crossed and having remote portions pivotally secured in spaced relation on said frame, and carriage means supported on and adjustably shiftable longitudinally of said frame.

4. A table for X-ray examination comprising hollow metal members rigidly interconnected to form a table frame, and a support structure for said frame including a base having spaced supports, a pair of supporting and tilting members each having a portion pivotally secured respectively each on a corresponding one of said supports on said base, said members being relatively crossed and having remote portions pivotally secured in spaced relation on said frame, and means to relatively shift said crossed members on said base to alter the supported inclination of the frame with respect to the base.

5. A table for X-ray examination comprising a base, a table frame, carriage means supported on and adjustably shiftable longitudinally of said frame, and table tilting and supporting means carrying said table on said base and comprising a tilting member and a tie link rockingly connected on spaced rocking pivots on said base. said tilting member and tie link being pivotally connected at spaced apart pivot stations on said table frame, and being relatively crossed one with respect to the other, and means to rotate said tilting member about its rocking pivot on said base.

6. A table, as set forth in claim 5, wherein said frame comprises a longitudinal member on one side thereof, said pivot stations being formed on said longitudinal member to support said frame on one side thereof.

'7. A table, as set forth in claim 5, wherein the means to rotate the tilting member comprises a thrust member disposed in position to exert thrust between said tilting member and said base at thrust stations on said base and tilting member remote from. the rocking pivot of said member.

8. A table, as set forth in claim 5, wherein the means to rotate the tilting member comprises a thrust member disposed in position to exert thrust between the rocking pivot of said tie link and portions of said tilting member spaced from its rocking pivot.

9. A table, as set forth in claim 5, wherein the means to rotate the tilting member comprises a thrust member disposed in position to exert thrust between said thrust member comprising a roller adapted for rolling engagement on said tilting member.

10. A table for X-ray examination comprising hollow metal members rigidly interconnected to form a table frame having spaced, parallel side members, a support base, support means pivotally connected on said base and having pivotal connection on one side only of said frame on one of said side members, whereby to support the frame in cantilever fashion, carriage means adjustably shiftable longitudinally of said frame,

actuating means disposed within said hollow metal members and drivingly connected with said carriage means for adjustably shifting same on said frame, said actuating means comprising a driving member supported within one of said hollow members and movable longitudinally thereof, and transmission means drivingly connecting said driving means with said shiftable support means.

11. A table for X-ray examination comprising hollow metal members rigidly interconnected to form a table frame having spaced, parallel side members, a support base, support means pivotally connected on said base and having pivotal connection on one side only of said frame on one of said side members, whereby to supportthe frame in cantilever fashion, carriage means adjustably shiftable longitudinally of said frame, and actuating means disposed within said hollow metal members and drivingly connected with said carriage means for adjustably shifting same on said frame, said driving means comprising a stem guidingly supported within one of said hollow members for actuating movement longitudinally thereof.

12. A table comprising interconnected frame members, including a hollow sheet metal member, forming an elongated frame having spaced, parallel side members, a support base, support means on said base and having pivotal connection at spaced support stations on one side only of said frame, a cassette carriage extending between and mounted upon said side members for adjustable movement longitudinally of said frame, panel means forming a table top on said 18. A table comprising means forming a frame having spaced side members, a cassette carriage shiftable on and between and longitudinally of said side members, an adjustable support structure for mounting said frame, panel means forming a table top on said frame in position extending above said cassette carriage, a support carriage movable longitudinally of said table, and having support portions extending outwardly and upwardly of said frame in position to support X-ray apparatus above said panel means, means forming a track for said support carriage, and hydraulic actuating means for shifting said cassette carriage on the frame, for shifting said support carriage on its track, and for adjusting said support structure, said hydraulic means including a source of fluid pressure, and a separate hydraulic driving device for each of said cassette carriage, support carriage and said support structure and drivingly connected therewith, each said driving device being connected through a corre sponding control valve with said source of fluid pressure.

ARTHUR J. KIZAUR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,874,582 Nelson Aug. 30, 1932 1,945,499 Flarsheim Jan. 30, 1934 1,957,720 Nelson May 8, 1934 2,076,246 Nelson Apr. 6, 1937 2,186,660 Alopaeus Jan. 9, 1940' 2,208,258 Grobe July 16, 1940 2,379,080 Hillenbrand June 26, 1945 FOREIGN PATENTS Number Country Date 358,059 Great Britain Apr. 27, 1931 OTHER REFERENCES Campbell Electric Co. RM 849, pp. 14 and 15. 

